首页>
外国专利>
FRAMEWORK FOR FRAMING REQUIREMENTS FORMED FORMS AND FREQUENCIES OF FREQUENCY REQUIREMENTS FOR THE PRESSURE OF REQUIREMENTS
FRAMEWORK FOR FRAMING REQUIREMENTS FORMED FORMS AND FREQUENCIES OF FREQUENCY REQUIREMENTS FOR THE PRESSURE OF REQUIREMENTS
展开▼
机译：框架要求框架形式的形式和压力的频率要求的频率
展开▼
页面导航
摘要
著录项
相似文献
摘要
A process for preparing shaped articles from waste gypsum from wet-process phosphoric acid production comprises: (1) mixing wet calcium sulfate hemihydrate with 0.5-20% by wt. of calcium hydroxide or calcium oxide, (2) adjusting the total water content of said mixture to 20-40% by wt., if necessary, and (3) molding shaped articles from said mixture by compression molding. The shaped objects so prepared have a low density and relatively high compressive strength.
展开▼
